P1122
Throttle Position Sensor Circuit Intermittent Low Voltage
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Unstable engine idling
- Dips during acceleration
- Reduced engine power
- Check Engine Light Intermittently Turning On
- Increased fuel consumption
Causes
- Oxidation or damage to sensor contacts
- Open or shorted wiring harness
- Malfunction of the throttle position sensor itself
- Problems with power supply to the sensor circuit
- Corrosion of connectors
How to Fix
- Check the condition of the sensor connectors and contacts
- Test the resistance and voltage in the sensor circuit
- Check the integrity of the wiring harness
- Replace the throttle position sensor if necessary
- Clean contacts and treat with protective compound